As Hawkeye or Ronin, no superhuman powers.
Size Alteration: Thanks to the works of Hank Pym, Barton had the abilities as Goliath to use Pym Particles to grow to immense size or shrink to tiny proportions. The Particles would interact with the electrical impulses of his brain, creating an organism-wide "growth field" or "reducing field."
The growth process required the rapid acquisition of bodily mass, presumably from an extra-dimensional source. This extra-dimensional mass fortified all of his cellular tissue, including his bones and muscles, enabling him to support his increased weight, and giving him superhuman strength.
Via the shrinking process, Barton could shrink down to a size as low as one half-inch in height. Usually, he did not compress his mass into his smaller size. Instead his mass was extended into an extra-physical dimension that is opened by the activating of the Pym Particles, from which the mass could later be reclaimed. Strangely, because his mass was extended extra-dimensionally when he was at reduced size, Barton retained full human-size strength at that size.
Unlike Pym or the Wasp, he was never exposed to Pym Particles long enough to control his size at will, and thus had to use gas capsules infused with the Particles to shrink, grow, or revert to normal size.
Master Archer: Barton has trained himself to become a master archer specializing in the use of regular bows, longbows, compound bows, and crossbows with near-perfect accuracy. He is capable of firing multiple arrows at a single target in a few seconds, hitting multiple targets in a few quick strokes, and directly hit small targets in the greatest of distances. As Hawkeye, he practiced a minimum of two hours per day to keep his skills honed.
Expert Marksman: He possesses very keen eyesight, and his accuracy is virtually unerring; he was trained in his youth by Trick Shot with throwing blades, balls, bolas, and boomerangs. He now has near-perfect precision with any aimed or thrown weapon. He can hurl objects with extreme speed and accuracy, both in direct aim and complicated rebounds/interactions.
Expert Acrobat: Barton possesses exceptional human strength, endurance, and stamina. He is athletic, with very good reflexes and agility. This, combined with training as an aerialist and acrobat, makes him capable of complex acrobatic maneuvers.
Expert Fighter: Barton is an excellent martial artist, having been trained in various forms by Captain America, who was arguably the world's greatest hand-to-hand combatant. On his first mission with Luke Cage's band of renegade New Avengers, Ronin proved to have come a long way from his old days of rarely ever using his martial arts skills. Throughout the battle against Elektra and The Hand, he demonstrated great skill in his overall martial ability, holding his own against nearly endless hordes of ninjas. This earned him a very respecting compliment from his teammate Iron Fist, one of the world's top martial artists.
Skilled Tactician: As shown in his leadership of the West Coast Avengers and the Thunderbolts, Barton is a highly competent strategist, tactician, and field commander.
Weapons Proficiency: Although as Hawkeye he was not known to use the martial arts style weapons he now uses in his Ronin identity (usually katana or nunchaku), Barton's incredible reflexes and hand-eye coordination allow him to easily master most weapons. He also received training in swordsmanship during his youth from the original Swordsman, who was considered one of the greatest experts in sword-fighting the world has ever known. Barton is one of the few people to be able to properly handle Captain America's shield.
As Hawkeye or Ronin, Barton possesses the normal human strength of a man of his age, height, and build who engages in intense regular exercise and is considered athletic. As Goliath, strength varied according to the height he achieved: at 10 feet tall, Barton could lift (press) 1000 pounds, at 25 feet tall he could lift (press) 10 tons, and at 100 feet tall, Barton could lift (press) 50 tons. The higher Barton grew past 25 feet, the more of his strength he had to use simply to support his own enormous mass. While shrinking as Goliath, Barton retained his normal strength.
He was once 80% deaf due to an injury, but his hearing was restored during his rebirth on Franklin Richards' Counter-Earth.
The Ronin armor provides protection and allows the user to blend in with the shadows. formerly Specially padded armor, Avengers Identicard, briefly wore a suit of armor built by Tony Stark that provided protection from bullets.
Formerly Avengers Quinjets, sky-cycles, Atomic Steed
As Ronin, Barton uses katana, nunchaku which can also extend into a bo (a nod to Mockingbird's staves) , and shuriken. formerly (as Hawkeye) custom-made bow, quick-release quiver, and a number of specialty arrows, briefly wielded Captain America's Shield.